Fix: add mandatory arg_index to l3_l2_orch_comm test

[ChaoWao]

Summary

Fixes the st-sim-a5 breakage on main: test_l3_l2_orch_comm.py calls CoreCallable.build without the mandatory arg_index introduced by #1123, so it raises at build time and fails on every PR merging against current main.

• Declares arg_index=[0, 1] for signature=[D.IN, D.OUT] — the explicit per-slot payload mapping every other migrated incore already uses.
• Root cause: Add: L3-L2 orchestration communication design #1015 (which added this test) merged after Fix: attribute dumped tensors per-subtask via mandatory arg_index #1123's ~250-site arg_index sweep without reconciling. See st-sim-a5 broken on main: test_l3_l2_orch_comm omits mandatory arg_index (#1015 × #1123 merge skew) #1170 for the full analysis.

Testing

• st-sim-a5 (the failing job) — relying on CI; the omitted argument is the sole cause and the value matches the signature=[D.IN, D.OUT] ordering.

Fixes #1170

[coderabbitai]

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📝 Walkthrough

Walkthrough

The test case in tests/st/a5/tensormap_and_ringbuffer/l3_l2_orch_comm/test_l3_l2_orch_comm.py now passes arg_index=[0, 1] to CoreCallable.build together with signature=[D.IN, D.OUT].

Changes

L3-L2 orchestration communication test

Layer / File(s)	Summary
Explicit child argument mapping tests/st/a5/tensormap_and_ringbuffer/l3_l2_orch_comm/test_l3_l2_orch_comm.py	The CoreCallable.build(...) child configuration adds arg_index=[0, 1] next to signature=[D.IN, D.OUT].

Sequence Diagram(s)

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 I hop through tests with ears held high,
An index now sits by IN and OUT nearby.
One tiny tweak, a tidy little clue,
And the orchard path runs straight and true.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly states the main fix: adding the required arg_index in the l3_l2_orch_comm test.
Description check	✅ Passed	The description is directly related to the test fix and explains the breakage and the intended correction.
Linked Issues check	✅ Passed	The change matches #1170 by adding arg_index=[0, 1] alongside signature=[D.IN, D.OUT] in the affected test.
Out of Scope Changes check	✅ Passed	The PR appears scoped to the single required test change with no unrelated modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[gemini-code-assist]

Code Review

This pull request updates the test configuration in test_l3_l2_orch_comm.py by adding the arg_index=[0, 1] parameter to the CoreCallable.build call. There are no review comments, and I have no feedback to provide.

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